QuoteIn particular Maris 2015 which summarises Maris's earlier work (from 2002 I think) claiming that he has observed bubbles with fractional electron charge, and the more recent vortex explanation of the same phenomenon.
Maybe yes, maybe not - but I don't see the logic. Of course that the mobility of electron bubbles is much lower than the mobility of single electron - they're much bigger. Why it would require fractional electron charge for its explanation?